Hot-water heater.



J. COOPER.

HOT WATER HEATER.

APPLIUATION FILED JULY 2, 1909. 968,45 1 Patented Auga 23, 1910.

2 SHEETS-SHEET}.

gflg 55 Z3 "3 L N 2 F Lnih -h WITNESSES: IN NTOR WATTORNEY J. COOPER.

HOT WATER HEATER.

APPLICATION FILED JULY 2, 1909. 968,451 Patented Aug. 23, 1910.-

2 8EEETSSHEBT 2.

WITNESSES: I Q IIVVENTOR l 1m! NORRIS-PETERS 00.. VIASIHNGY'WI, n c

UNITE El SAT a1 anssrn scores, or Darren, OHIO.

HOT-HATER HEATER.

Specification of Letters Patent.

Patented Aug. 23, 1910.

Application filed July 2, 1909. Serial No. 505,732.

T 0 all whom it may concern:

Be it known that I, Jnssin Coorna, a citizen of the United States, residing at Day ton, Ohio, whose post-oflice address is No. 2145 North Main street, in said city of Dayton, have invented certain new and useful Improvements in Hot-'Water Heaters, of which the following is a specification.

My invention relates to heaters such as are used in houses, cars, ,or other structures, in connection with a hot water circulating pipe system. Its object is to increase the efficiency of such heaters by providing, instead of the usual iron or brick-lined fire-pot, a fire-basket consisting of a plurality of water tubes placed one above the other and forming part of the water heating system, the tubes inclosing and being in direct contact with the burning fuel.

The invention also includes other features of construction, which will be pointed out in this specification and in the claims.

In the drawings, Figure 1 is a front elevation of a heater embodying my invention; Fig. 2 is an elevation of the same device with the front casing removed; Fig. 3 is a vertical section on the plane 33, Fig. 2; Fig. 4 is a horizontal section on the plane 4.- 1, Fig. 2.

11 designates the front, 12, 12, the side, and 13 the rear Wall of an outer jacket the top of which is provided with a connection 14 for a smoke pipe 15, 15 are the side plates of an inner casing or shell, set away from the side walls 12 of the outer jacket so as to form air spaces 16, 16 for the reduction of radiation. The rear plate 17 of the inner casing has, as shown, water tight connection with the rear wall 13 of the outer jacket, thereby forming a water wallor space 18 therebetween, the two being connected by staybolts 19 in the usual manner.

In the lower part of the jacket beneath the grate 20 are suitably supported transverse plates 21, 22, the space between which, accessible by the door 23, may be used as a coal bunker; while the space between the upper plate 21 and the grate forms the usual ash-pit, its door 24: being provided with the ordinary draft slide 25. The fire-basket, which takes the place of the ordinary firepot, and forms the chief feature of my invention, consists of a plurality of single, unitary, bent tubes 26, shown as L-shaped, having their inner ends threaded or swaged into the plate 17 so that they have water connection with the water wall 18, and having their free ends 27 plugged or otherwise closed. In the present instance, there are four pairs of these tubes 26, vertically disposed and having their closed ends 27 nearly adjacent each other at the front of the fire-basket.

Within the inner casing and above the fire-basket is placed a large number of single, unitary, straight tubes 28, having their rear ends connected with the water wall 18 and their free ends closed, the tubes being placed in staggered relation to each other, the lower tubes forming an arch, see Fig. 2, within which the fire door 29 opens. This door 29 is hinged on to a large cleaning door 30, in which is shown a check draft slide 31. Openings 32, 32 are provided in the top of the inner casing to permit the products of combustion to pass to the flue opening 14:. The flow and return ends of the circulating pipes are connected to the water wall 18 at 33 and 34. respectively. The squared ends of the grate bars 20 project through openings 35 in the front 11, which openings may be closed by pivoted caps 36.

The operation of the device will be readily understood from an inspection of the drawings. It is obvious that the mass of burning fuel is inclosed at its sides and approximately at its front by the tubes 26 and at its rear by the water wall 18, so that the water in these tubes and in the lower part of the water wall will be heated by direct conduction; and that the'water in the upper part of the water wall and in the tubes 28 will be heated by the hot gases, which must pass upward between the tubes 28 to the exit 1 1. The cleaning door 30 gives access to all the tubes 28, so that they may be readily freed from accumulations of soot and dust.

It will be understood that many merely mechanical changes other than those indicated may be made in the device without departing from my invention. Thus, 6. 9., the form and arrangement of the outer jacket, the provision of a coal bunker be neath the ash-pit, the strictly vertical arrangement of the tubes which constitute the firebasket, etc, are clearly non-essential. By the word superposed, used in the claims with reference to these tubes comprising the fire-basket, I do not imply that they are either in exactly vertical relation, nor that they rest one upon another, it being only essential that they together form a suitable basket, substituted for the usual fire-pot, as a receptacle for the mass of burning fuel. Under the term bent as applied to the tubes forming the fire-basket, I of course include tubes consisting of a plurality of pieces connected by the ordinary angular fittings.

By the phrase unitary, single, as applied to the tubes 26 and 28, I intend to confine myself to a single, plain tube, as distinguished from a tube having a second smaller tube inserted therein, or from a tube having a diametric partition or any other mechanical means for directing the flow and return of water therethrough. It will be seen that these tubes 26, as well as the upper tubes 28, are all plugged or otherwise closed at their free ends. It has been experimentally determined that a return tube, 11 0., one having both its ends connected with the water back, if placed in a substantially horizontal position, induces a very slow flow of water in one direction therethrough; and that, by reason of this slow movement, slime or sediment from the water is deposited therein, which soon insulates the contained water from the metal of the tube, and burns out the latter. however, the water flows in both directions at the same time, so that no scale is deposited, and the tubes remain intact. This fact has been amply demonstrated by removal and examination of the plugged tubes after long use.

hat I claim is:

1. A water heating device including a jacket; a Water wall; a plurality of pairs of superposed, single, unitary, closed-end, bent tubes, each connected with said water wall and forming therewith a fire-basket adapted to directly contain a mass of burning fuel, the closed ends of each. pair of said tubes being adjacent each other.

2. A Water heating device including a jacket; a water wall at the rear side of said jacket; a plurality of pairs of superposed, single, unitary, closed-end, bent tubes, each connected with said water wall and forming therewith a fire-basket adapted to directly contain a mass of burning fuel, the closed ends of each pair of said tubes being adjacent each other approximately at the middle of the front side of said jacket; and a fire door in said jacket above all of said tubes.

3. A water heating device including a jacket; a water wall; a plurality of pairs of With the closed end tubes,

superposed, single, unitary, closed-end, bent tubes, each connected with said water wall and forming therewith a fire-basket adapted to directly contain a mass of burning fuel, the closed ends of each pair of said tubes being adjacent each other; a plurality of single, unitary, closed-end tubes each connected with said water wall within said jacket and above said fire-basket; and a fire door in said jacket above said fire-basket and substantially below said last-named tubes.

4. A water heating device including a jacket; a water wall; a plurality of pairs of superposed, single, unitary, closed-end, bent tubes, each connected with said water wall and forming therewith a fire-basket adapted to directly contain a mass of burning fuel, the closed ends of each pair of said tubes being adjacent to each other; a plurality of single, unitary, closed-end tubes each connected with said water wall within said jacket and above said fire-basket, the lower of said tubes being arranged in the form of an arch to provide a combustion chamber above said fire-basket; and a fire door in said jacket communicating with said combustion chamber.

5. A water heating device including a jacket; a water wall forming one side of said jacket; a fire-basket, formed of closed end, bent tubes, occupying the lower part of said jacket; a plurality of water tubes each connected with said water wall occupying the upper part of said jacket; air passages at the sides formed by walls spaced from said jacket; a cleaning door in the front wall of said jacket covering the ends of approximately all of said tubes; and a fire door mounted on the lower part of said cleaning door and above said fire-basket.

6. A water heating device including a jacket; a water wall forming one side of said jacket; a fire-basket, formed of closedend, bent tubes, within said jacket; a plurality of closed-end tubes, each connected with said water wall, occupying the upper part of said jacket above said firebasket; air passages at the sides formed by walls spaced from said jacket; said jacket being extended below said fire-basket to provide an ash-pit and a fuel storage compartment below said ash-pit.

JESSIE COOPER.

\Vitnesses:

G120. D. COOPER, VVELLMonn B. TURNER. 

